No chrome valve covers or air cleaners on factory 1962 Chevrolet 283 and 327 cars or 1962 409 cars.
The air cleaner in your picture is a factory 1963 340 HP low hp 409 single 4 barrel air cleaner. All
409 cars from the factory starting in 1963 to 1965 came with chrome valve covers and chrome air cleaners.
1962 283, 327 and 409 cars came with black painted air cleaners(single and dual 4 barrel) and Chevy orange valve covers on 283 and 327 cars and silver 409 valve covers.
I had my 1962 valve covers (no triangle on 62 327 valve covers) chromed and I added a chrome dual snorkel 1963 single high horsepower 400 HP air cleaner. See pictures of my 1962 327 motor with chrome valve covers and dual snorkel air cleaner(I like my 327 this way).